Jessi Rumfield spent her childhood in the house next door, challenging Rowan Cohen to tennis matches while his older brother, Luke, studied in the background and Mel watched over the three like the mother Jessi always wished she had. Now it's been almost a year since Jessi visited the Cohen house. Rowan is gone. Mel is in remission and Luke hates Jessi for the role she played in breaking his family apart. Jessi spends her days at a dead-end summer job avoiding her real mother, who suddenly wants to play a role in Jessi's life after being absent for so long. When Luke comes home from college, it's hard to ignore the past. When he asks Jessi to pretend to be his girlfriend for the final months of Mel's life, she finds that everything has changed-- but is willing to play pretend for one final summer. -- adapted from jacket